—Listen! There is a knock on the door．Who _____ it be?—It must be Jack．Just now I sent for him．
#87583
A
shall
B
can
C
must
D
might
推荐题目
I ______ Peter with his work, but I had a lot of things to do myself.
#86588
A
must have helped
B
should have helped
C
needn’t have helped
D
can’t have helped
---How did you do in the test yesterday? -----Not so well. I ______ much better but I misread the directions for writing。
#87321
A
will have done
B
could have done
C
must have done
D
may have done
I _____ have written to him because he phoned me shortly afterwards.
#90086
A
ought to
B
must
C
couldn’t
D
needn’t